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Er-Fe2O3/BiVO4 photocatalyst for degrading rhodamine B and preparation method thereof

An er-fe2o3, photocatalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low utilization of sunlight and no catalytic activity , limit the application of catalysts, etc.

Inactive Publication Date: 2021-06-01
赵慧鸣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used is TiO excited by ultraviolet light. 2 However, due to its wide band gap (3.2eV), it only responds in the ultraviolet light range and does not have catalytic activity in the visible light range, so TiO 2 The utilization rate of sunlight in the base photocatalyst is low during use, which greatly limits the practical application of this type of catalyst.

Method used

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  • Er-Fe2O3/BiVO4 photocatalyst for degrading rhodamine B and preparation method thereof
  • Er-Fe2O3/BiVO4 photocatalyst for degrading rhodamine B and preparation method thereof
  • Er-Fe2O3/BiVO4 photocatalyst for degrading rhodamine B and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1)Er-Fe 2 o 3 Precursor preparation: 0.5mmol Er 2 o 3 Dissolve in 0.1mol / L nitric acid solution, add 4mmol Fe(NO 3 ) 3 9H 2 O and 5mmol (NH 4 ) 3 C 6 h 5 o 7 After continuing to stir and dissolve, dilute to 70mL with deionized water, and then place it in a polytetrafluoroethylene liner reactor at 140°C for hydrothermal reaction for 12h. After the reaction is completed, the product is centrifuged, washed, and dried to obtain Er-Fe 2 o 3 Precursor;

[0024] (2)Er-Fe 2 o 3 The preparation of: the step (1) is made Er-Fe 2 o 3 The precursor was placed in a muffle furnace and calcined in the air for 4h at a temperature of 600°C to collect Er-Fe 2 o 3 ;

[0025] (3)Er-Fe 2 o 3 / BiVO 4 Preparation: Weigh 5mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL nitric acid solution, and 5mmol NH 4 VO 3 Dissolve in 10mL 2mol / L NaOH solution, Bi(NO 3 ) 3 The solution was added dropwise to NH 4 VO 3 In the solution, add the Er-Fe that step (2) makes after magn...

Embodiment 2

[0029] (1)Er-Fe 2 o 3 Precursor preparation: 0.8mmol Er 2 o 3 Dissolve in 0.1mol / L nitric acid solution, add 5mmol Fe(NO 3 ) 3 9H 2 O and 6mmol (NH 4 ) 3 C 6 h 5 o 7 After continuing to stir and dissolve, dilute to 70mL with deionized water, and then place it in a polytetrafluoroethylene liner reactor at 140°C for hydrothermal reaction for 12h. After the reaction is completed, the product is centrifuged, washed, and dried to obtain Er-Fe 2 o 3 Precursor;

[0030] (2)Er-Fe 2 o 3 The preparation of: the step (1) is made Er-Fe 2 o 3 The precursor was placed in a muffle furnace and calcined in the air for 3h at a temperature of 500°C to collect Er-Fe 2 o 3 ;

[0031] (3)Er-Fe 2 o 3 / BiVO 4 Preparation: Weigh 6mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL nitric acid solution, and 7mmol NH 4 VO 3 Dissolve in 10mL 2mol / L NaOH solution, Bi(NO 3 ) 3 The solution was added dropwise to NH 4 VO 3 In the solution, add the Er-Fe that step (2) makes after magn...

Embodiment 3

[0033] (1)Er-Fe 2 o 3 Precursor preparation: 1 mmol Er 2 o 3 Dissolve in 0.1mol / L nitric acid solution, add 6mmol Fe(NO 3 ) 3 9H 2 O and 7mmol (NH 4 ) 3 C 6 h 5 o 7 After continuing to stir and dissolve, dilute to 70mL with deionized water, and then place it in a polytetrafluoroethylene liner reactor at 140°C for hydrothermal reaction for 12h. After the reaction is completed, the product is centrifuged, washed, and dried to obtain Er-Fe 2 o 3 Precursor;

[0034] (2)Er-Fe 2 o 3 The preparation of: the step (1) is made Er-Fe 2 o 3 The precursor was placed in a muffle furnace and calcined in the air for 2h at a temperature of 800°C to collect Er-Fe 2 o 3 ;

[0035] (3)Er-Fe 2 o 3 / BiVO 4 Preparation: Weigh 4mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL nitric acid solution, and 6mmol NH 4 VO 3 Dissolve in 10mL 2mol / L NaOH solution, Bi(NO 3 ) 3 The solution was added dropwise to NH 4 VO 3 In the solution, add the Er-Fe that step (2) makes after magne...

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Abstract

The invention discloses an Er-Fe2O3 / BiVO4 photocatalyst for degrading rhodamine B and a preparation method thereof. The method comprises the following steps of: (1) preparation of an Er-Fe2O3 precursor; (2) preparation of Er-Fe2O3; and (3) preparation of Er-Fe2O3 / BiVO4; the Er-Fe2O3 / BiVO4 photocatalyst is prepared through the three steps, the Er-Fe2O3 / BiVO4 photocatalyst is obtained by conducting composite modification on Er-doped Fe2O3 with a narrow forbidden bandwidth and BiVO4, more electrons and holes are generated, and the photocatalytic activity is remarkably improved. Er is doped into Fe2O3, so that the light absorption range of Fe2O3 can be expanded, the carrier excitation capability is improved, meanwhile, Er can become a carrier capture trap, the service life of Er can be prolonged, and the photocatalytic activity can be improved.

Description

technical field [0001] The present invention relates to photocatalyst material, be specifically related to a kind of Er-Fe that is used for degrading Rhodamine B 2 o 3 / BiVO 4 photocatalyst material. Background technique [0002] As the main source of water pollution, the environmental pollution caused by industrial dye wastewater has attracted more and more attention. Triphenylmethane dyes are widely used as industrial dyes due to their bright color, high color fixation rate, and good color fastness, and they are used in large amounts. However, this kind of dye wastewater has become one of the wastewater that needs to be treated urgently at this stage due to its high chroma, strong toxicity, refractory degradation, and easy carcinogenicity. For example, rhodamine B dyes are carcinogenic and mutagenic. This type of wastewater has deep chroma, high content of organic pollutants, and poor biodegradability. It is difficult to treat with conventional methods such as physical...

Claims

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Application Information

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IPC IPC(8): B01J23/847C02F1/30C02F101/38
CPCB01J23/8472C02F1/30C02F2305/10C02F2101/38B01J35/39
Inventor 赵慧鸣
Owner 赵慧鸣
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